NYACK — The U.S. Coast Guard has levied new restrictions on boating in the vicinity of the Tappan Zee Bridge to reflect the increase in construction activity in the river.All boaters now are required to use the main channel, reduce wake and use extreme caution when moving through the area. The restrictions extend from 300 yards north of the existing bridge to 200 yards south of it.Details about the Coast Guard's regulations are posted at navcen.uscg.gov and broadcast regularly on maritime channels. They will remain in effect until construction of the new bridge is completed in 2018.The New York state Thruway Authority also includes boating safety information on the project's website, newnybridge.com.JudyRife@gmail.com